I've been given a non-starting blower motor that was said to be faulty and replaced to the tune of about $1500. When I got the motor on the bench, it passed a basic run test, starting just fine and running steadily.
The motor apparently has some sort of serial port with Rx and Tx pins, positive power and common terminals. The test procedure merely connects 24 volts of 60 Hz AC between common and Rx, whence the motor does a soft start and runs steadily, with a slight hunt that is reasonable for a no-load condition.
Does anybody have info or docs which might let me do a more thorough test, such as vary the speed or read back data from the motor? The motor is simply marked
Genteq
ECM 3.0 GCO8
1/2 HP 120/240 V
5/20/2010 15 0006MC5
Letter O and numeral 0 look the same, so the transcription might mix them.
There is a URL, thedealertoolbox.com, but I could find no useful information. YouTube videos proved far more helpful. The motor came out of a Carrier central HVAC system which has been surprisingly troublesome.
Thanks for reading,
bob prohaska